I personally used to be anti-MM myself. Now I've revised my stand quite a bit. I should in fact say that MMing was taught to me when I was around 7 myself, and I didn't see much use for it then.
I think you'll find that mind-maps are pretty good for outlines and linking ideas together. It's good for overviews as well. However, if you're using it to understand technical material, well, don't expect it to do the understanding for you would be my stand. Just my take on it.

KWLee